Determination of reduction of useful volume in water reservoirs due to sedimentation

Abstract

To develop a work plan for reliable and efficient use of water reservoirs, an accurate information about the volume of water stored in the reservoir for the safe operation of the reservoir facilities is necessary. The useful water storage capacity of reservoirs has been steadily declining over the years due to the sedimentation coming with the stream. The article presents a method for determining the continuous change of the reservoir volume during operation due to sedimentation. A calculation method estimating the dynamics of the sediment distribution in the reservoir has been scientifically developed. The proposed calculation method was tested and compared in the field conditions. The analysis of the data collected in the Chimkurgan, Tashkent and South Surkhan water reservoirs under field conditions based on mathematical statistical methods showed a relationship between the relative turbidity and the reservoir depth. A new method of determining the decrease in useful water volume due to sedimentation in reservoirs has been proposed.

Modification of dispersion systems and its motion in cylindrical pipes

“…When obtaining the equations of motion of modified dispersed systems (MDS) in pipelines, stable motion in cylindrical pipelines was considered as a two-phase flow based on mathematical models [4,6,11]. Using one of the basic equations of hydrodynamics -the theorem on the quantitative change in motion, separate equations for the flow of liquid and modified solid particles of a two-phase (liquid + modified solid particles) flow, stably moving through a cylindrical pipe, have been compiled.…”

“…To increase their productivity, one of the most important tasks is creating calculation methods, in conjunction with the physicochemical and mechanical properties of the phases of the system, the composition of dispersed systems, their viscosity [1][2][3]. It is known that research works aimed at the development of energy-saving methods for ensuring the hydrotransport of dispersed systems through pressure pipes, as well as new methods and technologies for improving the methods of transferring dispersed systems through pipelines, taking into account their concentration, mechanical composition, and structure in such industries as the mining industry, water management, construction [4][5][6][7].…”

Increasing the efficiency of sedimentation tanks for drinking water treatment

“…For the first time in Russian practice, the calculation of a thin-layer sedimentation tank, based on the elementary theory of sedimentation, was given by V.A. Radtsig [15].…”

Methods for determining water flow from rice field to open drainage system

“…The ability to easily analyze remote sensing data (RS) data at GIS increases the degree of its use in various fields. Another useful feature is using images to explore areas that are difficult to navigate and explore [17][18][19]. However, initially, they were of low resolution and were not available in the water sector [20][21][22].…”